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d3161defd6
Added an extension point after vectorizer passes in the PassBuilder. Additionally, added extension points before and after vectorizer passes in `buildLTODefaultPipeline`. Credit goes to @mshockwave for guiding me through my first LLVM contribution (and my first open source contribution in general!) :) - Implemented `registerVectorizerEndEPCallback` - Implemented `invokeVectorizerEndEPCallbacks` - Added `VectorizerEndEPCallbacks` SmallVector - Added a command line option `passes-ep-vectorizer-end` to `NewPMDriver.cpp` - `buildModuleOptimizationPipeline` now calls `invokeVectorizerEndEPCallbacks` - `buildO0DefaultPipeline` now calls `invokeVectorizerEndEPCallbacks` - `buildLTODefaultPipeline` now calls BOTH `invokeVectorizerStartEPCallbacks` and `invokeVectorizerEndEPCallbacks` - Added LIT tests to `new-pm-defaults.ll`, `new-pm-lto-defaults.ll`, `new-pm-O0-ep-callbacks.ll`, and `pass-pipeline-parsing.ll` - Renamed `CHECK-EP-Peephole` to `CHECK-EP-PEEPHOLE` in `new-pm-lto-defaults.ll` for consistency. This code is intended for developers that wish to implement and run custom passes after the vectorizer passes in the PassBuilder pipeline. For example, in #91796, a pass was created that changed the induction variables of vectorized code. This is right after the vectorization passes.